backstage/.changeset/eight-toys-feel.md

@backstage/backend-app-api

@backstage/backend-app-api
patch

Added a configuration to permit backend plugin module failures on startup:

backend:
  ...
  startup:
    plugins:
      plugin-x:
        modules:
          module-y:
            onPluginModuleBootFailure: continue

This configuration permits plugin-x with module-y to fail on startup. Omitting the onPluginModuleBootFailure configuration matches the previous behavior, wherein any individual plugin module failure is forwarded to the plugin and aborts backend startup.

The default can also be changed, so that continuing on failure is the default unless otherwise specified:

backend:
  startup:
    default:
      onPluginModuleBootFailure: continue
    plugins:
      catalog:
        modules:
          github:
            onPluginModuleBootFailure: abort